<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Charcoal - Free Bootstrap 4 UI Kit</title>
        <meta name="description" content="Charcoal is a free Bootstrap 4 UI kit build by @attacomsian at Wired Dots." />
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <!--Bootstrap 4-->
        <link rel="stylesheet" href="css/bootstrap.min.css">
    </head>
    <body>

        <nav class="navbar navbar-expand-md navbar-dark fixed-top sticky-navigation">
            <a class="navbar-brand font-weight-bold" href="#">在线OJ系统</a>
            <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#topMenu" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
            </button>

            <div class="collapse navbar-collapse" id="topMenu">
                <ul class="navbar-nav ml-auto">
                </ul>
            </div>
        </nav>

        <!--hero section-->
        <section class="bg-hero">
            <div class="container">
                <div class="row vh-100">
                    <div class="col-sm-12 my-auto text-center">
                        <h1>我的OJ平台</h1>
                        <p class="lead text-capitalize my-4">
                            基于Java Sevlet 实现的 OJ 系统。
                        </p>
                        <a href="https://gitee.com/boss-boss-with-boss/online-oj.git" class="btn btn-outline-light btn-radius btn-lg">项目链接</a>
                    </div>
                </div>
            </div>
        </section>
        <!--components-->
        <section class="my-5 pt-5">
            <div class="container">
                <!-- Brand color  -->
                <!-- Links  -->
                <!-- Grid  -->
                <!-- Fonts  -->
                <!-- Buttons  -->

                <!-- Forms  -->

                <!-- Dropdown  -->

                <!-- Navs  -->


                                <!-- Content Panel -->

                <!-- Navbar  -->


                <!-- Tables  -->






                        <div class="mt-3 mb-5">
                            <h3>题目列表</h3>
                            <table class="table table-striped">
                                <thead>
                                    <tr>
                                        <th>编号</th>
                                        <th>标题</th>
                                        <th>难度</th>
                                    </tr>
                                </thead>

                                <tbody id="problemTable">
<!--                                    <tr>-->
<!--                                        <td>1</td>-->
<!--                                        <td>-->
<!--                                            <a href="">两数之和</a>-->
<!--                                        </td>-->
<!--                                        <td>简单</td>-->
<!--                                    </tr>-->

                                </tbody>
                            </table>
                        </div>

        <!--footer-->
        <section class="py-5 bg-dark">
            <div class="container">
                <div class="row">
                    <div class="col-md-6 offset-md-3 col-sm-8 offset-sm-2 col-xs-12 text-center">
                        <!-- <h3>Upgrade to Pro Version</h3>
                        <p class="pt-2">
                            We are working on <b>Charcoal Pro</b> which will be released soon. The pro version
                            will have a lot more components, sections, icons, plugins and example pages.
                            Join the waiting list to get notified when we release it (plus discount code).
                        </p>
                        <a class="btn btn-warning" href="https://wireddots.com/newsletter">Join Waiting List</a>
                        <hr class="my-5"/> -->
                        <p class="pt-2 text-muted">
                            &copy; by 提莫队长
                        </p>
                    </div>
                </div>
            </div>
        </section>

        <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js"></script>
        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>
        <script src="js/app.js"></script>
                <script>
                    //在页面加载的时候，尝试从服务器获取题目列表。通过ajax的方式获取
                    function  getProblems(){
                        //1.先通过ajax从服务器获取题目列表
                        $.ajax({
                            url:"problem",
                            type:"GET",
                            success:function (data,status){
                                //data是响应的body，status是响应的状态码
                                //2.把得到的响应数据给构造成HTML片段
                                makeProblemTable(data);
                            }
                        })
                    }
                    //通过这个函数来把数据转换成HTML页面片段
                    function  makeProblemTable(data){
                        let problemTable=document.querySelector("#problemTable");
                        for(let problem of data){
                            let tr=document.createElement("tr");
                            let tdId=document.createElement("td");
                            tdId.innerHTML=problem.id;
                            tr.appendChild(tdId);
                            let tdTitle=document.createElement("td");
                            let a=document.createElement("a");
                            a.innerHTML=problem.title;
                            a.href='problemDetail.html?id='+problem.id;
                            a.target='_blank';
                            tdTitle.appendChild(a);
                            tr.appendChild(tdTitle);
                            let tdLevel=document.createElement("td");
                            tdLevel.innerHTML=problem.level;
                            tr.appendChild(tdLevel)

                            problemTable.appendChild(tr);
                        }
                    }
                    getProblems();
                </script>
    </body>

</html>
